A 7.7 T NbTi Superconducting Magnet System Cooled by a 4 K Gm Refrigerator

Heterogeneous Single-Site Catalysts for Olefin Polymerization

“…Silicas with a wide range of particle sizes, surface areas, and pore volumes have been used. Most commonly, these have had a particle size of about 50−100 μm, but single-site catalysts were supported on silica with an average particle size as low as 0.012 μm; improvements in film properties were claimed . Numerous techniques have been disclosed for supporting and finishing the catalyst in order to optimize catalyst activity, particle morphology, and particle bulk density without seriously affecting polymer properties.…”

The odd-isotope fractions of barium in CEMP-r/sstar HE 0338-3945 andr-II star CS 31082-001

“…Explosive conditions are usually suggested for the r-process, such as occur in core-collapse supernova (SNe II, M(M ⊙ ) > 8, Woosley et al 1994) and neutron-star mergers (Rosswog et al 2000). Usually, SNe II is thought as a popular site for the rprocess (see, e.g., Woosley et al 1994;Takahashi et al 1994;Terasawa et al 2002;Wanajo et al 2002;Thompson 2003). However, the latest model simulations found that SNe II do not produce the necessary neutron fluxes for r-process synthesis, whereas the neutron star merger do (see Wanajo et al 2011;Janka 2012;Burrows 2013).…”

Comparative Study of Effect of Initial Sintering in Rod/Tube Shape on Jc and Fracture Strength of Bi-2223: 10 wt % Ag Bulk Rod Conductors

“…However, in comparison to reported J c values for Bi(Pb)-2223 tube shaped current leads, these J c values for rods are lower due to self-induced magnetic field. [1][2][3][4] The magnetic field dependence of J c for both the RSR and TSR samples at 77 K is shown in Fig. 6.…”

“…Despite the successful use of the most adequate high-T c Bi-2223 bulk tube current leads in ''cryocooled'' superconducting magnets, [1][2][3][4] because of their low heat capacity and high critical current density (J c ), reports on the use of Bi-2223 bulk rod current leads are scarce probably because of low J c 's due to self induced fields and other factors that limit high current transport, the development of Bi-2223 rods in comparison with tube conductors is a low priority. Only conventional methods of preparation involving twostep sintering have been reported thus far, which include initial sintering in the rod form.…”